Vikings officially activate CB Cook, bring up DE from practice squad

As anticipated, the Vikings officially took cornerback Chris Cook off their injured reserved list Saturday after missing eight weeks of the season with a broken arm, the Star Tribune reports.

Also activated was defensive end George Johnson from the team's practice squad.

The Star Tribune noted that the addition of Johnson may be a signal that defensive end Brian Robison -- who sustained a Grade 3 shoulder sprain last week against the Rams -- might not be ready to play Sunday against the Texans.

The Vikings placed running back Adrian Peterson on injured reserve Monday. The all-pro is expected to miss eight-to-nine months after tearing his ACL and MCL in his left knee during the third quarter of Saturday's win over the Redskins. Running back Caleb King was activated from the practice squad, along with tight end Mickey Shuler.